Process for the preparation of a phosphate fertilizer.



. No Drawing.

. rip.

VITTORID VOLPATO, F MILAN, ITALY.

rnoonss non THE rnnrana'rron or A PHOSPHATE FERTILIZE To all whom it may concern:

Be it known that I, Vrr'ronro VOLPATO, a subject of the Kingdom of Italy, and resident of Milan, Italy, have invented certain new and useful Improvements in and Relating to Processes for the Preparation of phorite, a phosphocarbonate will resultwhich" is readily assimilable.

The materials used are: 40% dolomite, sodium carbonate; 35% sodium sulfate. Such materials, preferably in the said proportions are intimately mixed together and 6% of the whole mixture is mixed I With phosphorite containing 60% of tricalcium phosphate.

The final mixture is heated to a temperature of 750 C. and upon issuing from the I furnace will be quenched by being treated with water.

I claim: 1. A process .of rendering available the Specification of Letters Patent. Patented J 111116 12 191?. Application filed October 27, 1916. Serial No. 127,996.

rock with a smaller quantity of a mixture of dolomite, sodium carbonate and sodium sulfate, heating the mixture to about 750 (3., and then treating the product with water. 7

3. A process of preparing an as'similable phosphatic fertilizer consisting in roasting a mixture comprising 100 parts of phosphorite containing about 60% tricalcium phosphate and about 6. parts of a mixture of 40% dolomite, 25% sodium carbonate and 35% sodium sulfate, at a temperature of about 750 (3., and thereafter treating thecalcined mass with water.

In testimony whereof I afix m signature, in presence of two witnesses.

DR. VITTORIO VOLPAIO. Witnesses:

LUIS F. HERNANDEZ, GRAU GIACOMO GUARNURI. 

